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Biblioteca(s): |
Embrapa Unidades Centrais. |
Data corrente: |
18/03/1998 |
Data da última atualização: |
18/03/1998 |
Autoria: |
CORREA, A. E.; PAVAN, M. A.; MIYAZAWA, M. |
Título: |
Aplicacao de boro no solo e respostas do cafeeiro. |
Ano de publicação: |
1985 |
Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, Brasilia, v.20, n.2, p.177-181, fev. 1985. |
Idioma: |
Português |
Conteúdo: |
Estudou-se a resposta de mudas de cafeeiros a nutricao de B, em Latossolo Roxo Distrofico e em Latossolo Vermelho-Escuro Distrofico fase arenosa apresentando diferente capacidade de adsorcao. Os tratamentos consistiram da adicao de solucao de acido borico (0,0; 0,5; 1,0; 2,0; 4,0 e 8,0). Foram avaliados quatro metodos para extracao de B dos solos: pasta de saturacao; HCI 0,05 N; HC1 0,1 N; e HC1 0,05 N + H2SO4 0,025 N. Os teores de B foram determinados pelo metodo com azometina-H. A adsorcao de B pelos solos foi consistente com o mecanismo descrito pela isoterma de Langmuir, com excecao dos desvios observados quando a concentracao de B na solucao do solo foi superior a 4. A quantidade de B adsorvido aumentou com o pH. Determinou-se que a capacidade dos solos de adsorverem B depende da textura deles. As tecnicas de extrato da saturacao e da extracao de HC1 0,05 N mostraram a melhor correlacao com a absorcao de B pelas plantas. Encontrou-se que os cafeeiros respondem somente ao B em solucao e nao sao diretamente influenciados pelo B adsorvido. |
Palavras-Chave: |
Azomethine-H; Azometina-H; Metodo de extracao de B do solo; Soil boron extraction method. |
Thesagro: |
Adsorção; Coffea Arábica. |
Thesaurus Nal: |
adsorption. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01702naa a2200229 a 4500 001 1104481 005 1998-03-18 008 1985 bl uuuu u00u1 u #d 100 1 $aCORREA, A. E. 245 $aAplicacao de boro no solo e respostas do cafeeiro. 260 $c1985 520 $aEstudou-se a resposta de mudas de cafeeiros a nutricao de B, em Latossolo Roxo Distrofico e em Latossolo Vermelho-Escuro Distrofico fase arenosa apresentando diferente capacidade de adsorcao. Os tratamentos consistiram da adicao de solucao de acido borico (0,0; 0,5; 1,0; 2,0; 4,0 e 8,0). Foram avaliados quatro metodos para extracao de B dos solos: pasta de saturacao; HCI 0,05 N; HC1 0,1 N; e HC1 0,05 N + H2SO4 0,025 N. Os teores de B foram determinados pelo metodo com azometina-H. A adsorcao de B pelos solos foi consistente com o mecanismo descrito pela isoterma de Langmuir, com excecao dos desvios observados quando a concentracao de B na solucao do solo foi superior a 4. A quantidade de B adsorvido aumentou com o pH. Determinou-se que a capacidade dos solos de adsorverem B depende da textura deles. As tecnicas de extrato da saturacao e da extracao de HC1 0,05 N mostraram a melhor correlacao com a absorcao de B pelas plantas. Encontrou-se que os cafeeiros respondem somente ao B em solucao e nao sao diretamente influenciados pelo B adsorvido. 650 $aadsorption 650 $aAdsorção 650 $aCoffea Arábica 653 $aAzomethine-H 653 $aAzometina-H 653 $aMetodo de extracao de B do solo 653 $aSoil boron extraction method 700 1 $aPAVAN, M. A. 700 1 $aMIYAZAWA, M. 773 $tPesquisa Agropecuaria Brasileira, Brasilia$gv.20, n.2, p.177-181, fev. 1985.
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Embrapa Unidades Centrais (AI-SEDE) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
24/10/2012 |
Data da última atualização: |
20/02/2015 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
RESENDE JUNIOR, M. F. R.; MUÑOZ, P.; RESENDE, M. D. V. de; GARRICK, D. J.; FERNANDO, R. L.; DAVIS, J. M.; JOKELA, E. J.; MARTIN, T. A.; PETER, G. F.; KIRST, M. |
Afiliação: |
M. F. R. RESENDE JUNIOR, UNIVERSITY OF FLORIDA; P. MUÑOZ, UNIVERSITY OF FLORIDA; MARCOS DEON VILELA DE RESENDE, CNPF; D. J. GARRICK, IOWA STATE UNIVERSITY; R. L. FERNANDO, IOWA STATE UNIVERSITY; J. M. DAVIS, UNIVERSITY OF FLORIDA; E. J. JOKELA, UNIVERSITY OF FLORIDA; T. A. MARTIN, UNIVERSITY OF FLORIDA; G. F. PETER, UNIVERSITY OF FLORIDA; M. KIRST, UNIVERSITY OF FLORIDA. |
Título: |
Accuracy of genomic selection methods in a standard data set of loblolly pine (Pinus taeda L.) |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
Genetics, v. 190, p. 1503-1510, April 2012. |
Idioma: |
Inglês |
Conteúdo: |
Genomic selection can increase genetic gain per generation through early selection. Genomic selection is expected to be particularly valuable for traits that are costly to phenotype and expressed late in the life cycle of long-lived species. Alternative approaches to genomic selection prediction models may perform differently for traits with distinct genetic properties. Here the performance of four different original methods of genomic selection that differ with respect to assumptions regarding distribution of marker effects, including (i) ridge regression–best linear unbiased prediction (RR–BLUP), (ii) Bayes A, (iii) Bayes Cp, and (iv) Bayesian LASSO are presented. In addition, a modified RR–BLUP (RR–BLUP B) that utilizes a selected subset of markers was evaluated. The accuracy of these methods was compared across 17 traits with distinct heritabilities and genetic architectures, including growth, development, and disease-resistance properties, measured in a Pinus taeda (loblolly pine) training population of 951 individuals genotyped with 4853 SNPs. The predictive ability of the methods was evaluated using a 10-fold, cross-validation approach, and differed only marginally for most method/trait combinations. Interestingly, for fusiform rust disease-resistance traits, Bayes Cp, Bayes A, and RR–BLUB B had higher predictive ability than RR–BLUP and Bayesian LASSO. Fusiform rust is controlled by few genes of large effect. A limitation of RR–BLUP is the assumption of equal contribution of all markers to the observed variation. However, RR-BLUP B performed equally well as the Bayesian approaches.The genotypic and phenotypic data used in this study are publically available for comparative analysis of genomic selection prediction models. MenosGenomic selection can increase genetic gain per generation through early selection. Genomic selection is expected to be particularly valuable for traits that are costly to phenotype and expressed late in the life cycle of long-lived species. Alternative approaches to genomic selection prediction models may perform differently for traits with distinct genetic properties. Here the performance of four different original methods of genomic selection that differ with respect to assumptions regarding distribution of marker effects, including (i) ridge regression–best linear unbiased prediction (RR–BLUP), (ii) Bayes A, (iii) Bayes Cp, and (iv) Bayesian LASSO are presented. In addition, a modified RR–BLUP (RR–BLUP B) that utilizes a selected subset of markers was evaluated. The accuracy of these methods was compared across 17 traits with distinct heritabilities and genetic architectures, including growth, development, and disease-resistance properties, measured in a Pinus taeda (loblolly pine) training population of 951 individuals genotyped with 4853 SNPs. The predictive ability of the methods was evaluated using a 10-fold, cross-validation approach, and differed only marginally for most method/trait combinations. Interestingly, for fusiform rust disease-resistance traits, Bayes Cp, Bayes A, and RR–BLUB B had higher predictive ability than RR–BLUP and Bayesian LASSO. Fusiform rust is controlled by few genes of large effect. A limitation of RR–BLUP is the assumption of equal contrib... Mostrar Tudo |
Palavras-Chave: |
Precisão. |
Thesagro: |
Pinus Taeda; Seleção Genética. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02528naa a2200265 a 4500 001 1937733 005 2015-02-20 008 2012 bl uuuu u00u1 u #d 100 1 $aRESENDE JUNIOR, M. F. R. 245 $aAccuracy of genomic selection methods in a standard data set of loblolly pine (Pinus taeda L.)$h[electronic resource] 260 $c2012 520 $aGenomic selection can increase genetic gain per generation through early selection. Genomic selection is expected to be particularly valuable for traits that are costly to phenotype and expressed late in the life cycle of long-lived species. Alternative approaches to genomic selection prediction models may perform differently for traits with distinct genetic properties. Here the performance of four different original methods of genomic selection that differ with respect to assumptions regarding distribution of marker effects, including (i) ridge regression–best linear unbiased prediction (RR–BLUP), (ii) Bayes A, (iii) Bayes Cp, and (iv) Bayesian LASSO are presented. In addition, a modified RR–BLUP (RR–BLUP B) that utilizes a selected subset of markers was evaluated. The accuracy of these methods was compared across 17 traits with distinct heritabilities and genetic architectures, including growth, development, and disease-resistance properties, measured in a Pinus taeda (loblolly pine) training population of 951 individuals genotyped with 4853 SNPs. The predictive ability of the methods was evaluated using a 10-fold, cross-validation approach, and differed only marginally for most method/trait combinations. Interestingly, for fusiform rust disease-resistance traits, Bayes Cp, Bayes A, and RR–BLUB B had higher predictive ability than RR–BLUP and Bayesian LASSO. Fusiform rust is controlled by few genes of large effect. A limitation of RR–BLUP is the assumption of equal contribution of all markers to the observed variation. However, RR-BLUP B performed equally well as the Bayesian approaches.The genotypic and phenotypic data used in this study are publically available for comparative analysis of genomic selection prediction models. 650 $aPinus Taeda 650 $aSeleção Genética 653 $aPrecisão 700 1 $aMUÑOZ, P. 700 1 $aRESENDE, M. D. V. de 700 1 $aGARRICK, D. J. 700 1 $aFERNANDO, R. L. 700 1 $aDAVIS, J. M. 700 1 $aJOKELA, E. J. 700 1 $aMARTIN, T. A. 700 1 $aPETER, G. F. 700 1 $aKIRST, M. 773 $tGenetics$gv. 190, p. 1503-1510, April 2012.
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